A Glaucoma Case-control Study of the WDR36 Gene D658G sequence variant

Area of Science:

• Ophthalmology
• Genetics
• Molecular Biology

Background:

• Primary open-angle glaucoma (POAG) is a leading cause of irreversible blindness worldwide.
• The WDR36 gene has been investigated for its role in POAG pathogenesis.
• The D658G mutation in WDR36 was previously suggested as a potential disease-causing mutation.

Purpose of the Study:

• To determine the prevalence and associated phenotype of the WDR36 D658G mutation in Australian POAG patients and normal controls.
• To assess the WDR36 D658G mutation's potential role in POAG in the Australian population.

Main Methods:

• A case-control study was conducted with 249 POAG patients and 217 age-matched controls from Tasmania, Australia.
• Genomic DNA was analyzed using polymerase chain reaction and BglI restriction enzyme digestion to detect the D658G variant.
• Statistical analysis (chi-squared test) was used to compare variant frequencies between cases and controls.

Main Results:

• The WDR36 D658G variant was detected in 1.6% of POAG cases and 1.8% of control subjects.
• No significant difference in variant frequency was observed between POAG patients and controls (P = .84).
• Control subjects with the variant reported no family history of glaucoma.

Conclusions:

• The WDR36 D658G mutation appears to be a neutral variant in the Australian population.
• Further studies in diverse populations are necessary before definitively concluding WDR36 as a glaucoma-associated gene.
• The findings do not support a pathogenic role for WDR36 D658G in POAG in this cohort.